Qi is a central concept in traditional Chinese thought, used to explain how the cosmos takes shape, how life begins and how things change. It is understood both as the underlying basis of existence and as the vital substance and activity through which transformation occurs.
Drawing on classical Chinese philosophy and traditional Chinese medicine, this article explores the nature of qi, the distinction and relationship between innate and acquired qi, and the four movements of ascending, descending, exiting and entering. Together, these ideas form a framework for understanding the correspondence between the natural world and human life.
Qi as the common basis of the cosmos and life
Qi as a fundamental philosophical concept
In traditional Chinese philosophy, qi is the underlying vital substance through which the cosmos emerges, life originates and all things develop. It connects Heaven and Earth, as well as bodily form and spirit. The Yiwei Qianzaodu expresses this relationship in the phrase “What changes is qi.” In this account, the transformations described by Yi, or the principles of change, take place through the movement of qi.
Between Heaven and Earth, formless qi intermingles and circulates without ceasing. As it gathers, it takes shape and gives rise to things; as it disperses, it returns to the formless expanse known as the Great Void. All material forms are understood as the products of qi gathering and transforming. This idea of transformation through qi is central to the traditional Chinese view of the cosmos.
Transformation through qi in nature and the human body
The Huangdi Neijing, or Yellow Emperor’s Inner Canon, states that “Human beings are born of the qi of Heaven and Earth.” This expresses the idea that human life and the transformations of nature share a common origin. Within this framework, the same underlying patterns operate in both the cosmos and the body.
On the cosmic scale, qi differentiates into clear and turbid qualities, yin and yang, and the Five Phases, also commonly called the Five Elements. Through these differentiations arise the seasons, heat and cold, mountains and rivers, plants and all other things. Qi serves as both their material basis and the force that sustains their activity.
In the human body, traditional Chinese medicine distinguishes the qi of the organs, nutritive and defensive qi, and the qi of the channels. These forms of qi are understood to govern growth and development, metabolism, the circulation of qi itself, and mental and conscious activity.
Innate and acquired qi
Qi in the human body can be divided into two broad categories according to its source, qualities and functions: innate qi and acquired qi. Each has a distinct role, yet they support and nourish one another. Together, they form the vital basis that sustains the body’s activities and stability.
Innate qi as the foundation of individual life
In the interpretation presented here, innate qi is also described as primordial qi, or yuanqi, and as one’s inborn endowment of qi. It is the configuration of the qi of Heaven and Earth received at birth, understood as the original basis and driving force of an individual’s life.
Within traditional Yi studies, the heavenly stems and earthly branches of a Bazi natal chart serve as a symbolic record of this inborn configuration. The chart’s patterns of cold and warmth, dryness and dampness, strength and weakness, and imbalance or completeness are interpreted as outward expressions of different states of primordial qi. Innate qi thus establishes the underlying qualities and capacities with which a person enters life.
Acquired qi as a source of ongoing renewal
Acquired qi develops after birth through the processes of life. Its formation and transformation are influenced by food and drink, daily routines and rest, emotional states, seasonal climate and the surrounding environment.
In traditional Chinese medicine, it has two principal sources: the refined essence of food and drink transformed and distributed by the spleen and stomach, and the clear qi of the natural world drawn in by the lungs. Together, these provide the acquired qi that supports everyday bodily activity.
The article also considers external influences through the traditional Bazi framework. Major fortune cycles, or dayun, and annual cycles, or liunian, represent changes in the qi of Heaven and Earth over time. Within this framework, those changes continually affect and modify the expression of a person’s innate qi, contributing to shifts in their condition and circumstances.
Compared with the given nature of innate qi, acquired qi is understood to be more responsive to regulation. It therefore provides a principal focus for traditional approaches to health preservation, the regulation of bodily functions and the treatment of illness.
The four movements of qi
Ascending, descending, exiting and entering are the basic forms of qi movement. They are understood as a shared pattern governing both the qi of the natural world and the qi of the human body.
The Huangdi Neijing conveys their importance in these words:
Without exiting and entering, there can be no birth, growth, maturity, aging or ending; without ascending and descending, there can be no generation, growth, transformation, gathering or storage.
This passage presents the movement of qi as essential to both natural transformation and the course of life.
The rhythms of the natural world
In nature, the ascending and descending of qi and the interaction of yin and yang give rise to the succession of the seasons, the alternation of heat and cold, and seasonal changes in plants and animals. These movements are understood as the driving force behind nature’s continual transformation.
Order and balance in the human body
In the body, the orderly ascent and descent, exit and entry of qi are understood to sustain the functions of the organs and the distribution and metabolism of qi, blood and body fluids. Their coordination provides the basis for the orderly activity of life.
Traditional Chinese medicine describes normal qi movement as continuous and unobstructed, with a balanced rhythm of ascent and descent. Stagnation, disrupted ascent and descent, or disordered exit and entry are understood as forms of imbalance that can disturb organ function and give rise to health problems.
A shared framework for nature and human life
The movement and transformation of qi give concrete expression to the principles of change in traditional Yi thought. This framework connects the underlying basis of the cosmos, the rhythms of nature and the activities of living beings.
From qi as a fundamental vital substance, through the distinction between innate and acquired qi, to the four movements of ascending, descending, exiting and entering, the theory offers a unified way of interpreting transformation. It also provides a framework for traditional health preservation and reflection on human life, expressing a distinctive Chinese understanding of vitality and existence.
Frequently asked questions
What is qi in Chinese philosophy?
Qi is a traditional concept used to explain the emergence and transformation of the cosmos and living beings. In this framework, it is both an underlying vital substance and the activity through which things form, develop and disperse.
What is the difference between innate and acquired qi?
Innate qi refers to the inborn foundation of an individual’s life. Acquired qi develops after birth, particularly through food, drink and breathing, and is also influenced by daily routines, emotions and the environment. The two are understood to support and nourish one another.
What are the four movements of qi?
The four movements are ascending, descending, exiting and entering. Traditional theory uses them to describe both natural cycles and the coordinated activity of qi within the human body.
How does Bazi relate to innate qi?
In the Bazi interpretation discussed here, a natal chart’s heavenly stems and earthly branches symbolically record an individual’s inborn configuration of qi. Major fortune cycles and annual cycles represent changing influences over time.